CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - Senior Convertible Notes [Member]
|12 Months Ended|
Dec. 31, 2018
|Debt Instrument, Interest Rate, Stated Percentage||4.00%|
|Debt Instrument, Term||5 years|
Contractual interest rate for funds borrowed, under the debt agreement.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
No definition available.